This is using instructions from Ton, so hopefully the implementation is ok. This is really needed here where we are using all sorts of wacky scales, and empties look too big or too small. Of course we don't want to scale the empties because there are often things parented to them. New options are in edit buttons for empties to control the display style and the size. New styles are easy to add, too. Just needs useful ideas and minor effort from anyone who wants to. Support for copying these values has also been added to the Copy Attributes ->Drawtype menu command.